(107)The best execution obligation under Directive 2014/65/EU requires investment firms to take all sufficient steps to obtain the best possible result for their clients. The quality of execution, which includes aspects such as the speed and likelihood of execution such as fill rate) and the availability and incidence of price improvement, is an important factor in the delivery of best execution. Availability, comparability and consolidation of data related to execution quality provided by the various execution venues is crucial in enabling investment firms and investors to identify those execution venues that deliver the highest quality of execution for their clients. In order to obtain best execution result for a client, investment firms should compare and analyse relevant data including that made public in accordance with Article 27(3) of Directive 2014/65/EU and respective implementing measures.